Redcrab was a very popular Minetestserver during late 2011-2013, and was played on by nearly all of the current long time members.
Note that Redcrab started to drop in users after 2012. There isn't too much difference between these two maps.
A collection of mods used to run Redcrab | 2MB | Github | Download (.zip)
Manually collected incomplete snapshot | 110MB | Download (.zip)
The source behind this website | Github | Download (.zip)